Process of making concrete construction.



, F. W. HARDING.

PROCESS OF MAKING CONCRETE CONSTRUCTION. APPLICATION FILED DEC.26. 19H.

1 ,203,327. 7 Patented Oct. 31, 1916.

UNITED STATES PATENT OFFICE.

FOSTER W. HARDING, OF SANTA ANA, CALIFORNIA.

PROCESS OF MAKING CONCRETE CONSTRUCTION.

Application filed December 26, 1911.

To all whom it may concern:

Be it known that I, Fos'rnn TV. HARDING, a citizen of the United States,residing at Santa Ana, in the county of Orange and State of California,have invented a new and useful Process of Making Concrete Construction,of which the following is a specification.

My invention relates to concrete construction, being particularlydesigned for piles, such as are used in wharf and pier construction.

It has been customary to place reinforcement, such as metal rods,struts, etc., in molds which are either set in position in which thework is to be permanently placed, or the work is built up in sections,which sections are made in forms. In either case the reinforcement isplaced in the form and the concrete poured into the form; but in mvinvention the reinforcement and the concrete are placed in the forms atthe same time, the reinforcement having one end secured to a suitablecore and the reinforcing material and the concrete built up on the coreby rotating the same, and one of the main objects of my invention is toproduce a concrete construction of maximum strength and durability in asimple and economical manner.

Other objects and advantages will appear hereinafter from the followingspecification.

Referring to the drawings. which are for illustrative purposes only:Figure 1 is a. front elevation of a device adapted to produce a concreteconstruction embodying a form of my invention. Fig. 2 is a. sectionalview on line n"-.r'- Fig. 1. Fig. 3 is a sectional view. similar to Fig.2, after the completion of the operation. Fig. 4 is a sectional view.similar to Fig. 2. showing a modified form of my invention. Fig. 5 is aside elevation of a concrete construction shown in Figs. 2 and 3. Fig.(3 is a side elevation. partly in section, of the concrete constructionshown in Fig. 4.

The apparatus used in my concrete construction consists of a suitableform of mold 2 formed of two members 3 hinged together at l, the upperportion of each member terminating in an outwardly flaring wall whichwalls 5 together form a longitudinal feed opening (3. Each member 3 isprovided with an end piece 7 which extends inwardly therefrom and fitsover a core or foundation 8. The two members 3 are held in closedSpecification of Letters Patent.

Patented Oct. 3 1916.

Serial No. 667,986.

position by any suitable closure means, such as eyes 9 on the respectiveendpieces 7. the opening in the eyes being adapted to register, when themembers 3 are in closed position,to receive a wedge or key 11. Thereinforcing element consists of wire netting 12 provided at intervalswith longitudinal reinforcing rods or bars 13 secured thereto, whichrods or bars extend upwardly from the face of the wire. A roll of thewire netting is mounted on a spool 11 supported in suitable brackets 15above the mold or form 2, the spool 11 being frictionally held againstrotation by means of a shoe 17 slidably mounted in a bracket 18, whichbracket 18 is supported on one of the brackets 15, the shoe 17 beingheld against the end of the spool 1% by means of a coil spring :20.

It is understood that the mold or form 2 and the wire netting orreinforcing element may be made any desired length, by lengthening eachof the same, to meet the special requirements of the Work beingperformed.

In the form shown in Figs. 1, 2, 3 and 5, the device is shown as used inthe application of a concrete reinforcement or protection for a woodenpile, the concrete being placed on the pile at that portion of the pileadjacent to the water level, being that point in which the pile issubjected to the greatest wear and strain. This is accomplished byplacing the core, in this instance consisting of a wooden pile,indicated at 8, in the mold 2, the pile 8 projecting beyond each end ofthe same. One end of the rein forcement or netting 12 is then secured tothe pile by means of nails 21 or other suitable fastener, and the pilerotated by any suitable means in the direction of the arrow shown inFig. 2, during which rotation concrete is poured into the opening 6 ofthe mold. The rotation of the pile 8 causes the reinforcement 12 to bebuilt up thereon in spiral form together with the concrete until theconcrete andreinforcement fill the in terior of the mold between thepile and the mold. The reinforcement is then cut and the pile rotatedseveral revolutions for the purpose of smoothing the exterior of theconcrete, and the concrete is then permitted to set. the constructionresulting from this operation presenting a cross sectional. appearanceas shown in Fig. 3 and an external appearance as shown in Fig. 5. Duringthe revolution of the core the bars 13 on the netting 12 serve ascarriers to take up concrete from the bottom of the mold and deposit thesame between the rolls of netting.

If desired, a hollow concrete pile may be constructed by following outthe operation above described, except that in fastening thereinforcement to the core the reinforcement is lightly fastened to thecore so that after the concrete has set the core may be pulledlongitudinally out of the concrete construction, thereby leaving ahollow concrete pile, the inner face of which consists of wire nettingand concrete, as shown in Figs. 4 and 6.

While I have shown and described my in vention as applied to thebuilding of concrete piles and coating or reinforcing wooden piles withconcrete, it is to be understood that my construction may be applied tovarious purposes without departing from the spirit of my invention, suchas concrete columns, pipes, and numerous other forms of construction.

The operation of forming the pile is continuous, the machine not beingstopped during the simultaneous operation of winding the reinforcementand pouring the cement until the pile is finished.

What I claim is 1. The process of producing a reinforced concrete pilewhich consists in rotating :1 core, winding a spiral reinforcement aboutsaid core, adding concrete to said reinforcement during the time it isbeing wound on said core, and so restraining said concrete that it canat no time during the winding operation exceed acertain diameter.

2. The process of producing a concrete pile which consists in rotating acore inside a cylindrical mold concentrically located with regard tosaid core, and simultaneously winding a spiral reinforcement about saidcore and adding concrete to said mold.

3. The process of producing a reinforced concrete pile which consists,in rotating a core concentrically located inside a cylinder, winding aspiral metal reinforcement on said core, said reinforcement beingintroduced into the cylinder through a slot in the top of said cylinder,and introducing concrete into said cylinder through said slot during thetime the core is being rotated.

In testimony whereof, I have hereunto set my hand at Fullerton,California, this th day of December, 1911.

FOSTER W. HARDING.

In presence of Lee W. KELLEY, R. B. ROBINSON.

